642901443 has 8 divisors (see below), whose sum is σ = 878109456. Its totient is φ = 418147200.

The previous prime is 642901433. The next prime is 642901459. The reversal of 642901443 is 344109246.

642901443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642901443 - 2⁸ = 642901187 is a prime.

It is a super-2 number, since 2×642901443² = 826644530822964498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (642901433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2613298 + ... + 2613543.

It is an arithmetic number, because the mean of its divisors is an integer number (109763682).

Almost surely, 2^642901443 is an apocalyptic number.

642901443 is a deficient number, since it is larger than the sum of its proper divisors (235208013).

642901443 is a wasteful number, since it uses less digits than its factorization.

642901443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5226885.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 642901443 is about 25355.5012374041. The cubic root of 642901443 is about 863.0741982844.

The spelling of 642901443 in words is "six hundred forty-two million, nine hundred one thousand, four hundred forty-three".